| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Wiper/Washer | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002OXL006X |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Front Wiper Motor Circuit |
DESCRIPTION
The windshield wiper ECU controls the wiper motor.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (FRONT WIPER MOTOR) |
(a) Using the Techstream, perform the Active Test.
NOTICE:
When a Body No. 5 (windshield wiper ECU) related front wiper switch is on, Active Test items related to the front wiper switch are prohibited (double operation prohibition). Check that the front wiper switches are off before performing Active Test.
Body No. 5
|
Item |
Test Details |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Wiper Motor HI |
Wiper motor HI operation |
ON / OFF |
- |
|
Wiper Motor LO |
Wiper motor LO operation |
ON / OFF |
- |
OK:
Front wiper motor operates.
|
|
2. |
INSPECT FRONT WIPER MOTOR |
|
(a) Remove the front wiper motor
|
(b) Apply battery voltage to the front wiper motor connector and check the speed of the front wiper motor.
OK:
|
Measurement Condition |
Specified Condition |
|---|---|
|
Battery positive (+) → Terminal 1 (+1) Battery negative (-) → Terminal 5 (E) |
Motor operates at low speed |
|
Battery positive (+) → Terminal 4 (+2) Battery negative (-) → Terminal 5 (E) |
Motor operates at high speed |
|
|
3. |
CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR - WINDSHIELD WIPER ECU AND BODY GROUND) |
|
(a) Disconnect the A22 motor connector. |
(b) Disconnect the E89 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A22-2 (B) - E89-8 (WIG) |
Always |
Below 1 Ω |
|
A22-1 (+1) - E89-1 (+1) |
||
|
A22-4 (+2) - E89-2 (+2) |
||
|
A22-3 (+S) - E89-7 (+SM) |
||
|
A22-5 (E) - Body ground |
||
|
A22-3 (+S) - Body ground |
Always |
10 kΩ or higher |
|
A22-2 (B) - Body ground |
||
|
A22-4 (+2) - Body ground |
||
|
A22-1 (+1) - Body ground |
|
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